Rotary churn-dasher



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L. .W. COLV ER. Rotary Chur rr.

No. 6,726. Patented Sept. 18, 1849..

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UNITED STATES PATENT ()FFICE.

LEWIS W. COLVER, OF ST. LOUIS, MISSOURI.

ROTARY CHURN-DASHER.

Specification of Letters Patent No. 6,726, dated September 18, 1849.

To all whom it may concern:

Be it known that I, LEwIs V. Convnn, of St. Louis, in the county of St.Louis and State of Missouri, have invented a new and useful Improvementin Churns, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawing, formingpart of this specification, in which Figure 1 is a perspective view ofmy churn; Fig. 2 is a vertical longitudinal sec' tion through the axisof the churn dasher; Fig. 3 is a vertical transverse section at thejoint 1, 1, (Fig. 2) of the flat case forming one end of the dasher; andFig. 4 is a vertical transverse section at the line m m of Fig. 2.

The nature of my improvement consists in giving the heaters of a churndasher a revolving motion on their own axis.

In the drawing, A is a rectangular box of any suitable dimensions tocontain the cream. The churn dasher is composed of sets of horizontalheaters B, B B B of peculiar form and construction, uniting theextremities of a cross C, at one end of the churn case, with a roundflat case D at its opposite end. Two of these heaters B, B have a wedgeform, their edge first entering the milk. The other two B B are eachcomposed of a horizontal fluted roller a and two edge-heaters b, b, theone on the inside and the other on the outside of the roller. The rolleris supported by two gudgeons, the one working in the arm of the cross,and the other in the inner face of the round case; the periphery of theroller is covered with hook shaped flutes. The outer faces of the twoedge heaters b, b, are flat, their inner faces are curved to receive thefluted roller, the surface of this curve is farthest from the roller atthat part where the flutes by the revolution of the roller firstapproach the face of the heater, and gradually approaches the rolleruntil at that partwhere the flutes leave the curved surface, there isjust room for their outer edges to pass, the edges of these edge-heaterswhich first strike the cream are made flaring to receive a largerportion of the cream bet-ween them, and conduct it to the roller. Thegudgeon c of the roller which is supported in the flat round case D isprolonged until its ext-remity enters the inner face of the outer sideof the case, and abelt pulley d is attached to flat case.

it. A short shaft 6 is passed horizontally through the center of theround case D and has a belt pulley f mounted upon it within the case; abelt 9 is passed around the two pulleys (Z, (Z, on the gudgeons of thefluted rollers a, a, and over the face of the central pulley f, and thetwo sides of this belt are prevented from rubbing against each other bya fourth pulley it, also contained in the The central pulley is heldstationary and the dasher is revolved around it, and as the centralpulley is much larger than the others the velocity of the rollers areproportionately increased.

The dasher thus constructed is supported and rotated in the followingmanner: A square socket is sunk in the center of the outer face of thefour armed cross C, this socket receives the squared extremity of ashort horizontal shaft. '5 which passes through one end of the churncase and has a crank E secured to its outer extremity. The outerextremity of the shaft of the stationary belt pulley f is squared, andreceived in a square socket sunk in the inner end of a slidinghorizontal bolt F which passes through the end of the box opposite tothe crank shaft. By sliding the bolt outward the squared end of the beltpulley shaft is liberated from the socket and the churn dasher can bewithdrawn from the case; the dasher is secured in place by a wedge jinserted between a stationary pin is in the case of the bolt anda boltpin Z passing through a longitudinal slot in this case. The rollergudgeons are packed to prevent the entrance of cream into the fiataround case D by the insertion of a ring of packing in a socket formedaround the gudgeon in the face of the case; this packing is kept inplace by a ring follower, m surrounding the gudgeon and pressed againstthe packing by the end of the fluted roller which is forced toward theflat case by a set screw 4?. acting on the end of the gudgeon at itsopposite extremity. The sliding bolt F, and the shaft of the stationarypulley f, are also packed in the same manner to prevent leakage. Theedge of one half of the flat around case is tongued, and,the edge of theopposite half is grooved; a piece of packing is inserted between the twoto prevent the cream from making its way into the case. I have hithertodescribed the fluted rollers as driven by a belt, that being mostconvenient in practice, but it is evident that cogwheels may be employedforthe same purpose.

The dasher is turned by the crank in the direction indicated by thearrow, and the fluted rolls are revolved by the belt in the samedirection; the rapid revolution of these last produces a violentagitation of the cream; the granules of butter are drawn by the hookedflutes into the converging spaces between the rolls and the edgebeaters, thus compressing them together and quickening the agglomerationof the particles.

'I Wish it to be distinctly understood that I do not intend to confinemyself to the precise construction and arrangement of LEWIS W. COLVER.Witnesses:

E. S. KENWIOK, P. H. WATSON.

